These days those aren't the only options; you can also use Nickel: https://github.com/nickel-lang/nickel-nix https://github.com/nickel-lang/nickel-nix Which is

These days those aren't the only options; you can also use Nickel: https://github.com/nickel-lang/nickel-nix https://github.com/nickel-lang/nickel-nix Which isn't fully baked, no, but here's hoping.